Claude skills are structured markdown files that tell Claude how to handle a specific type of task. It is—as the name suggests—a new skill Claude or any AI agent can “learn.” Each one defines a role for Claude to adopt, the inputs it needs, a step-by-step workflow, and a quality bar for the output. You can build them for anything—research synthesis, writing, code review, design critique. Once loaded, Claude follows the workflow instead of improvising.

Nick Babich, writing for UX Planet, put together 10 skills aimed at product designers. The three I’d reach for first are the UX Heuristic Review, the Design Critique Partner, and the Competitor Analysis Generator. All three give a solo designer a structured second opinion on demand: a heuristic eval against Nielsen’s 10, a senior-level design critique, or a competitive feature matrix.

Babich’s skill format is clean and worth studying even if you end up building your own from scratch. (Hint: or use Claude Code to write its own skills.)